动词-SC-OG:第31-39题 练习册详情

1

To develop more accurate population forecasts, demographers have to know a great deal more than now about the social and economic determinants of fertility.

• have to know a great deal more than now about the social and economic
• have to know a great deal more than they do now about the social and economical
• would have to know a great deal more than they do now about the social and economical
• would have to know a great deal more than they do now about the social and economic
• would have to know a great deal more than now about the social and economic

10000人做过此题 平均耗时为3min9s 平均正确率为 66%

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2

In a previous design, the weight of the discus used in track competition is concentrated in a metal center, but now it is lined with lead around the perimeter, thereby improving stability in flight and resulting in longer throws.

• In a previous design, the weight of the discus used in track competition is concentrated in a metal center, but now it is
• According to a previous design, the weight of the discus used in track competition was concentrated in a metal center, but now it is
• Once designed with its weight concentrated in a metal center, the discus used in track competition is now
• The discus used in track competition, once designed with its weight concentrated in a metal center, but now
• The discus used in track competition was once designed having its weight concentrated in a metal center and now

9992人做过此题 平均耗时为8min17s 平均正确率为 61%

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3

None of the attempts to specify the causes of crime explains why most of the people exposed to the alleged causes do not commit crimes and, conversely, why so many of those not so exposed have.

• have
• has
• shall
• do
• could

10000人做过此题 平均耗时为1min44s 平均正确率为 91%

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4

Retail sales rose 0.8 of 1 percent in August, intensifying expectations that personal spending in the July–September quarter more than doubled that of the 1.4 percent growth rate in personal spending for the previous quarter.

• that personal spending in the July–September quarter more than doubled that of
• that personal spending in the July–September quarter would more than double
• of personal spending in the July–September quarter, that it more than doubled
• of personal spending in the July–September quarter more than doubling that of
• of personal spending in the July–September quarter, that it would more than double that of

10000人做过此题 平均耗时为3min17s 平均正确率为 67%

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5

A surge in new home sales and a drop in weekly unemployment claims suggest that the economy might not be as weak as some analysts previously thought.

• claims suggest that the economy might not be as weak as some analysts previously thought
• claims suggests that the economy might not be so weak as some analysts have previously thought
• claims suggest that the economy might not be as weak as have been previously thought by some analysts
• claims, suggesting about the economy that it might not be so weak as previously thought by some analysts
• claims, suggesting the economy might not be as weak as previously thought to be by some analysts

10000人做过此题 平均耗时为2min17s 平均正确率为 75%

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6

There are several ways to build solid walls using just mud or clay, but the most extensively used method has been the forming of bricks out of mud or clay, and, after some preliminary air drying or sun drying, they are laid in the wall in mud mortar.

• the forming of bricks out of mud or clay, and, after some preliminary air drying or sun drying, they are laid
• forming the mud or clay into bricks, and, after some preliminary air drying or sun drying, to lay them
• having bricks formed from mud or clay, and, after some preliminary air drying or sun drying, they were laid
• to form the mud or clay into bricks, and, after some preliminary air drying or sun drying, to lay them
• that bricks were formed from mud or clay, which, after some preliminary air drying or sun drying, were laid

10000人做过此题 平均耗时为2min40s 平均正确率为 76%

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7

Carnivorous mammals can endure what would otherwise be lethal levels of body heat because they have a heat-exchange network which kept the brain from getting too hot.

• which kept
• that keeps
• which has kept
• that has been keeping
• having kept

10000人做过此题 平均耗时为1min46s 平均正确率为 91%

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8

In late 1997, the chambers inside the pyramid of the Pharaoh Menkaure at Giza were closed to visitors for cleaning and repair due to moisture exhaled by tourists, which raised its humidity to such levels so that salt from the stone was crystallizing and fungus was growing on the walls.

• due to moisture exhaled by tourists, which raised its humidity to such levels so that salt from the stone was crystallizing
• due to moisture that tourists had exhaled, thereby raising its humidity to such levels that salt from the stone would crystallize
• because tourists were exhaling moisture, which had raised the humidity within them to levels such that salt from the stone would crystallize
• because of moisture that was exhaled by tourists raising the humidity within them to levels so high as to make the salt from the stone crystallize
• because moisture exhaled by tourists had raised the humidity within them to such levels that salt from the stone was crystallizing

10000人做过此题 平均耗时为2min40s 平均正确率为 77%

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9

Of all the vast tides of migration that have swept through history, maybe none is more concentrated as the wave that brought 12 million immigrants onto American shores in little more than three decades.

• maybe none is more concentrated as
• it may be that none is more concentrated as
• perhaps it is none that is more concentrated than
• maybe it is none that was more concentrated than
• perhaps none was more concentrated than

10000人做过此题 平均耗时为2min17s 平均正确率为 81%

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